Improvement in conductors for telegraphs



J. MONTGOMERY.

- CONDUCTOR POR TBLEGRAPHS.

No. 103,072. Patented May 17, 1870.

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Letters Patent-N 103,072, dated May 17, 1870; anterlatell Apr-il 30, 1870.

IMPROVEMENT IN CONDUCTORS POR TELEGRAPHS.

The Schedule referred to ln these Letters Patent and mnking part of the lame.

To all whom it may concern:

Be it known that I, JAMES Moxruonnnr, of the city, county, and State of New York, have invented certain new and useful Improvements in '.lelegraphs; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings which are made a part of this speciticaton.

I support my telegraph-wires in insulating diaplnfagms, placed at proper distanecswlthln tubes of any convenient form, which may serve as rails i'or cars to run on, or for other purposes.

'Ihe said tubes or hollow rails are put together with longitudinal and transverse joint-s, which, while affording the necessary play to allow for expansion and shrinkage under changes ot' temperature, may be made proof against the ingress of moisture, while, at the same time, nermitting the. opening ot the tube f'or repairs.

I als) provide means whereby the wires may be tested at intervals in order to ascertain whether they are in eli'ective working condition or locate a bzeik.

In the drawings- Figure l is a plan, partly in horizontal section, ota hollow railway rail, with telegraph wires within.

Figure 2 is a vertical longitudinal section thereof'.

Figure 3 is a transverse section .of the same.

Similar letters of reference indicate corresponding parts in the several views.

A represents my tubular rail, which may` be made either with or wit-hout longitudinal joints, and supported by any suitable system of sleepers and ties.

H represents tubular couplings inserted in recesses in the end of the rail sections, so as to leave a ush surface on the interior, and eieetually prevent the opening of thel joints either designedly by the introduction of any sharp instrument, or accidentally' under the tremor or motion ot' the rails, or by expansion and contraction of the latter under changes of temperature.

,l I I represent' telegraph wires supported within' the rail by disks .T of glass or other insulating material.

The insulators J are i'ormed with iiangesj to retain' them in their proper vertical position.

1i K represent test-holes, through which a snit able instrument may be inserted in contact willi either ofthe wires, to ascertain whether they are in effective condition.

I propose to make these holes of a suitable shape and size to prevent the insertion of any instrumentby an unauthorized person to "tap the wires.7

This object maybe accomplished by making the apertures long and extremely narrow, so as to admit a tint bla-de, which may be iliade of steel no thicker than paper, or the apertures may -be made oi' irregn-- lar shape, with corresponding keys iitted to them.

The testkeys may be forked so as tov stride the wires, and may be faced with platinum in order to form electrical connection with greater' ease and effect.

lhc test-holes may be advantageously formed in the thimbies or joints Il.. Instead of tflieseopcn holes test-wires may be passed through insulators to the exterior, and each cluster of wires guarded by a locked cover or cap.

Having thus described my invention,

The following is what I claim as new therein, and desire to secure by Letters Patentl. lhe flanged insulators Jj, constructed as represented and described, when used in combination with a. hollow railway rail, in the manner and for the purposes stated.

2. The couplings H, inserted in recesses in the rail ends, in the manner and for the purposes set forth.

3. The test-holes K, for the purposes specified.

JAMES MONTGOMERY.

Witnesses Oorkvtcs KNIGHT. W. B. DEMING. 

